For each problem use Boolean algebra to simplify the equation. SHOW YOUR WORK, one step per line. You should use only variable names, negation (use `!'), AND (by putting terms next to each other), OR (with `+`), and parentheses. In addition, each line should start with an equal sign (`=`). The first step has been done for you to show how. Example: f(Z,Y,X) a. b. = !ZY!X + ZY!X + !YX = (!Z + Z)Y!X + !YX =Y!X + !YX f(A,B,C) = !A!BC + A!B!C + !ABC + !AB!C + A!BC f(A,B,C,D) = (!A!C + AD) (B(D + !BC))